AISI STANDARD. Code of Standard Practice. for Cold-Formed Steel. Structural Framing

Transcription

1 AISI S AISI STANDARD Code of Standard Practice for Cold-Formed Steel Structural Framing 2011 Edition Endorsed by Association of the Wall and Ceiling Industry Structural Building Components Association Steel Framing Alliance Steel Framing Industry Association Steel Stud Manufacturers Association

2 ii AISI S DISCLAIMER The material contained herein has been developed by the American Iron and Steel Institute Committee on Framing Standards. The Committee has made a diligent effort to present accurate, reliable, and useful information on trade practices for fabrication and installation of cold-formed steel structural framing. The Committee acknowledges and is grateful for the contributions of the numerous engineers, manufacturers, contractors and others who have contributed to the body of knowledge on the subject. Specific references are included in the Code of Standard Practice document. With anticipated improvements in understanding of the behavior of cold-formed steel framing and the continuing development of new technology, this material will become dated. It is anticipated that AISI will publish updates of this material as new information becomes available, but this cannot be guaranteed. No conflict between this Code of Standard Practice and any legal building regulation is intended. This Code of Standard Practice is intended only to supplement and amplify such legal building regulations and laws. The materials set forth herein are for general purposes only. They are not a substitute for competent professional advice. Application of this information to a specific project, particularly if included as part of a contract, should be reviewed by competent legal counsel. Anyone making use of the information set forth herein does so at their own risk and assumes any and all liability arising there from. 1st Printing November 2011 Copyright American Iron and Steel Institute 2011

3 Code of Standard Practice for Cold-Formed Steel Structural Framing iii PREFACE The American Iron and Steel Institute Committee on Framing Standards has developed this Code of Standard Practice for Cold-Formed Steel Structural Framing (Code of Standard Practice) to address trade practices for design, fabrication and installation of cold-formed steel structural framing products. This Code of Standard Practice is intended to serve as a state-of-the-art guide as well as a voluntary model for establishing contractual relationships between various parties in a construction project where cold-formed steel structural materials, components, or assemblies are used. It is not intended to take precedence over the contract, construction documents or the use of good judgment for specific construction projects and conditions. However, these provisions are considered suitable for reference or inclusion in contracts or construction documents and serve as a model for that purpose. This Code of Standard Practice is not applicable to non-structural members, including but not limited to interior drywall framing, which is addressed by ASTM C645 and C754, or structural steel, structural steel joists, steel deck, metal building systems or rack structures, which are addressed by AISC, SJI, SDI, MBMA and RMI, respectively. The purpose of the Commentary is to provide a record of the reasoning behind and the justification for the various provisions of this Code of Standard Practice. The Commentary is included as non-mandatory background to provide a series of explanations, illustrations, and interpretations for the owner s representatives, registered design professionals, contractors, suppliers, manufacturers, installers and others. The readers who wish to have more complete information, or who may have questions which are not answered by the abbreviated presentation of the Commentary, should refer to the Referenced Documents listed in Section A3. The Committee acknowledges and is grateful for the numerous engineers, manufacturers, contractors and others who have contributed to the body of knowledge on the subject. The Committee wishes to also express its appreciation for the support of the Association of the Wall and Ceiling Industry (AWCI), Structural Building Components Association (SBCA), Steel Framing Alliance (SFA), Steel Framing Industry Association (SFIA), and Steel Stud Manufacturers Association (SSMA). The first edition of this Code of Standard Practice was published in The 2006 Edition included new provisions on revisions, the RFI process, contract price adjustment and scheduling. This 2011 Edition has incorporated the truss responsibilities that were published in Supplement 2 to the North American Standard for Cold-Formed Steel Framing Truss Design, 2007 Edition.

4 iv AISI S AISI COMMITTEE ON FRAMING STANDARDS Richard Haws, Chairman NUCONSTEEL Steve Fox, Vice Chairman Canadian Sheet Steel Building Institute Helen Chen, Secretary American Iron and Steel Institute Don Allen Steel Stud Manufacturers Association Bill Babich ITW Building Components Group John Butts John F. Butts & Associates Brad Cameron Cameron Engineering Jay Crandell ARES Consulting Randy Daudet Simpson Strong-Tie Andrew DeRenzis NAHB Research Center Scott Douglas National Council of Structural Engineers Associations Nader Elhajj FrameCAD Solutions Ray Frobosilo Super Stud Building Products Greg Greenlee Engineering Partners International, LLC Jeff Klaiman ADTEK Engineers Roger LaBoube Wei-Wen Yu Center for Cold-Formed Steel Structures John Matsen Matsen Ford Design Associates, Inc. James Moses LiteSteel Technologies America LLC Kenneth Pagano Scosta Corporation Mike Pellock Aegis Metal Framing Nabil Rahman The Steel Network, Inc. Greg Ralph Dietrich Industries Gary Rolih Consultant Benjamin Schafer Johns Hopkins University Fernando Sesma California Expanded Metal Products Ryan Smith ClarkWestern Building Systems Sutton Stephens Kansas State University Tom Trestain T.W.J. Trestain Structural Engineering Steven Walker Light Gauge Steel Engineering Group, Inc. Robert Wessel Gypsum Association Lei Xu University of Waterloo Cheng Yu University of North Texas Rahim Zadeh Marino\WARE

5 Code of Standard Practice for Cold-Formed Steel Structural Framing v CODE OF STANDARD PRACTICE SUBCOMMITTEE Jeff Klaiman, Chairman ADTEK Engineers Helen Chen, Secretary American Iron and Steel Institute Don Allen Steel Stud Manufacturers Association Bill Babich ITW Building Components Group R. Scott Douglas National Council of Structural Engineers Associations Nader Elhajj FrameCAD Solutions Kirk Grundahl Structural Building Components Association Cold-Formed Steel Council Richard Layding NUCONSTEEL Kenneth Pagano Scosta Corporation Mike Pellock Aegis Metal Framing Nabil Rahman The Steel Network, Inc. Greg Ralph Dietrich Industries Fernando Sesma California Expanded Metal Products Ryan Smith ClarkWestern Building Systems, Inc. Steven Walker Light Gauge Steel Engineering Group, Inc. Rahim Zadeh Marino\WARE

6 vi AISI S This Page Is Left Blank Intentionally.

7 Code of Standard Practice for Cold-Formed Steel Structural Framing vii TABLE OF CONTENTS CODE OF STANDARD PRACTICE FOR COLD-FORMED STEEL STRUCTURAL FRAMING DISCLAIMER...ii PREFACE...iii AISI COMMITTEE ON FRAMING STANDARDS... iv CODE OF STANDARD PRACTICE SUBCOMMITTEE... v A. GENERAL...1 A1 Scope... 1 A2 Definitions... 1 A3 Referenced Documents... 4 A4 Responsibility for Design... 5 B. CLASSIFICATION OF MATERIALS...7 B1 Definition of Cold-Formed Steel Structural Framing... 7 B2 Other Items... 7 C. CONSTRUCTION DOCUMENTS...9 C1 Responsibilities... 9 C2 Limit of Responsibility C3 Jurisdiction C4 Discrepancies or Omissions C5 Revisions D. INSTALLATION DRAWINGS D1 Owner Responsibility D2 Component Manufacturer and Installer Responsibility D3 Review Process D4 General Responsibility E. MATERIALS E1 Structural Members E2 Fasteners and Connection Hardware E3 Preparation of Material E4 Member Identification E5 Special Marking E6 Camber F. INSTALLATION F1 Scope F2 Site Conditions F3 Delivery, Handling and Storage of Materials F4 Field Modifications and Repairs...16 F5 Installation Tolerances F6 Temporary Bracing G. QUALITY CONTROL G1 General G2 Material Inspection H. CONTRACTUAL RELATIONS H1 Construction Documents and Contracts H2 Presentation of Proposals H3 Acceptance of Proposals... 19

8 viii AISI S H4 Terms of Payment H5 The RFI Process H6 Revisions to the Construction Documents and Contract H7 Change Orders H8 Contract Price Adjustment H9 Scheduling I. PRACTICES SPECIFIC TO CFS COMPONENT ASSEMBLIES I1 Truss Responsibilities I1.1 Design of Trusses I1.2 Responsibilities of Truss Design Engineer/Truss Designer I1.3 Responsibilities of Truss Manufacturer I1.4 Responsibilities of Building Designer I1.5 Responsibilities of Contractor I1.6 Design of Permanent Individual Truss Member Restraint/Bracing... 26

9 Code of Standard Practice for Cold-Formed Steel Structural Framing A. GENERAL A1 Scope CODE OF STANDARD PRACTICE FOR COLD-FORMED STEEL STRUCTURAL FRAMING The practices in this Code of Standard Practice are a model to address the design, fabrication and installation of cold-formed steel (CFS) structural framing. When adopted wholly or in part by a contract or construction documents, the trade practices that are defined in this Code of Standard Practice shall govern the design, fabrication and installation of CFS structural framing. In addition to the requirements in Chapters A through H, Chapter I of this standard shall apply to CFS component assemblies. The practices defined in this Code of Standard Practice are the commonly accepted standards of custom and usage for the fabrication and installation of CFS structural framing, which generally represent the most efficient approach. This Code of Standard Practice is not intended to define a professional standard of care for the owner s representatives and building designer or change the duties and responsibilities of the owner, contractor, registered design professional (e.g., architect or structural engineer-of-record) from those set forth in the contract or construction documents. Nor does it assign to the owner or registered design professionals any duty or authority to undertake responsibility inconsistent with the provisions of the contract or construction documents. This Code of Standard Practice is not applicable to non-structural members, including but not limited to interior drywall framing, which is addressed by ASTM C645 and C754, or structural steel, structural steel joists, steel deck, metal building systems or rack structures, which are addressed by AISC, SJI, SDI, MBMA and RMI, respectively. An extended list of non-applicable items is given in Section B2. A2 Definitions Where terms appear in this standard in italics, such terms shall have meaning as defined in AISI S200 unless as defined herein. Terms included in square brackets are specific to LSD terminology. Terms not italicized shall have ordinary accepted meaning in the context for which they are intended. AISC. American Institute of Steel Construction. AISI. American Iron and Steel Institute. Approved. Acceptable to the code official or authority having jurisdiction. Bracing. Structural elements that are installed to provide restraint or support or both to other framing members so that the complete assemblies form a stable structure. Building Designer. Owner of the building or the person that contracts with the owner for the design of the framing structural system or who is responsible for the preparation of the construction documents. When mandated by the legal requirements, the building designer shall be a registered design professional (e.g., architect or structural engineer-of-record). Also referred to as owner s representative for design, but hereinafter will be referred to as building designer. CASE. Council of American Structural Engineers.

10 2 AISI S CFS. Cold-formed steel. CFS Structural Framing. The elements of the structural frame, as given in Section B1 of this Code of Standard Practice. CFS Component Assembly. A fabricated assemblage which consists primarily of CFS structural members that is manufactured by the CFS component manufacturer. CFS Component Design Drawing. The written, graphic and pictorial definition of an individual CFS component assembly, which may include engineering design data. Also referred to as truss design drawing for truss construction. CFS Component Designer. The individual or organization responsible for the engineering design of CFS component assemblies. Also referred to as truss design engineer on projects involving trusses, but hereinafter will be referred to as CFS Component Designer. CFS Component Manufacturer. The individual or organization responsible for the manufacturing of CFS component assemblies for the project. Also referred to as truss manufacturer on projects involving trusses, but hereinafter will be referred to as CFS Component Manufacturer. CFS Component Placement Diagram. The illustration supplied by the CFS component manufacturer identifying the location assumed for each of the CFS component assemblies which references each individually designated CFS component design drawing. Clarification. An interpretation of the construction documents that have been released for construction, providing an explanation that neither revises the information that has been released for construction nor alters the cost or schedule of performance of the work. Construction Documents. Written, graphic and pictorial documents prepared or assembled for describing the design (including the framing structural system), location and physical characteristics of the elements of a building necessary to obtain a building permit and construct a building. Contract. The legally recognized agreement between two parties, which defines, among other items, the responsibilities of the parties involved in bidding, purchasing, designing, supplying, and installing CFS framing. Contractor. Owner of the building, or the person that contracts with the owner, who constructs or manages the construction of the building in accordance with the construction documents. Also referred to as owner s representative for construction, but hereinafter will be referred to as contractor. Discrepancy. Any conflicts within the construction documents, or conflicts between the construction documents and applicable building codes. Drawings. See Plans and Installation Drawings. Embedded Anchor. A structural anchor or device (bolt, strap, plate, etc.) intended for fastening CFS structural framing to masonry or concrete that is installed prior to hardening of the grout or concrete. Framing Contractor. See Installer. Framing Material. Steel products, including but not limited to structural members and CFS component assemblies, ordered expressly for the requirements of the project. General Contractor. See Contractor. Installation Drawings. Drawings that show the location and installation of the CFS structural framing. Also referred to as truss placement diagram for truss construction. Installer. Party responsible for the installation of CFS products.

11 Code of Standard Practice for Cold-Formed Steel Structural Framing While this Code of Standard Practice was patterned after a similar document by the AISC, care was taken to use terminology to avoid confusion between material suppliers, fabricators and trades. Therefore, the term installer is used in reference to CFS structural framing versus the term erector typically used in reference to structural steel. Lateral Force-Resisting System. The structural elements and connections required to resist racking and overturning due to wind forces or seismic forces, or both imposed upon the structure in accordance with the applicable building code. Material Supplier. An individual or entity responsible for furnishing framing materials for the project. MBMA. Metal Building Manufacturers Association. Metal Building System. A complete integrated set of mutually dependent components and assemblies that form a building. As defined by the MBMA, a metal building system includes the primary and secondary framing, covering, and accessories, all of which are manufactured to permit inspection on site prior to assembly or installation. Owner. The individual or entity organizing and financing the design and construction of the project. Owner s Representative. The owner or individual designated contractually to act for the owner. Referred to as building designer when referencing owner s representative for design. Referred to as contractor when referencing owner s representative for construction. Plans. Also referred to as construction drawings. Drawings prepared by the building designer for the owner of the project. These drawings include but are not limited to floor plans, framing plans, elevations, sections, details and schedules as necessary to define the desired construction. Post-Installed Anchor. A structural anchor or device (bolt, clip, angle, bracket, etc.) intended for fastening CFS structural framing to hardened masonry or concrete. For anchorage to concrete, these anchors are installed after the concrete has achieved sufficient stiffness to be sawn or drilled. Receiving Entity. The individual or entity responsible to the contractor for accepting or rejecting furnished framing materials, and proper storage of received framing materials on the job site. Registered Design Professional. Architect or engineer, who is licensed to practice their respective design profession as defined by the legal requirements of the jurisdiction in which the building is to be constructed. Release for Construction. The release by the owner s representative permitting the CFS component manufacturer or installer to commence work under the contract, including ordering framing material and preparing installation drawings. Revision. An instruction or directive providing information that differs from information that has been released for construction. A revision may, but does not always, impact the cost or schedule of performance of the work. RFI. Request for Information. A written request for information or clarification generated during the bidding, design or construction phases of the project. RMI. Rack Manufacturers Institute. SDI. Steel Deck Institute.

12 4 AISI S Shop Drawings. Drawings for the production of individual CFS component assemblies for the project. Specialty Designer. The registered design professional, individual or organization having responsibility for the design of the specialty items. This responsibility shall be in accordance with the state s, province s or territory s statues and regulations governing the professional registration and certification of architects or engineers. Also referred to as CFS component designer, specialty engineer, delegated engineer, design engineer, registered engineer, and engineer, but hereinafter will be referred to as Specialty Designer. The requirement for a Specialty Designer is typically called out in the specifications or structural general notes. The Specialty Designer is typically not the building designer. Specifications. Written instructions, which, with the plans, define the materials, standards, design of the products, and workmanship expected on a construction project. SJI. Steel Joist Institute. SSMA. Steel Stud Manufacturers Association. Standard Cold-Formed Steel Structural Shapes. CFS structural members that meet the requirements of the SSMA Product Technical Information or AISI North American Standard for Cold-Formed Steel Framing Product Data. The AISI North American Standard for Cold-Formed Steel Framing Product Data was introduced in While the industry is encouraged to migrate to this new document, it is recognized that the SSMA document is also applicable and has widespread acceptance. Structural Steel. The elements of the structural frame defined as structural steel by AISC in the Code of Standard Practice for Steel Buildings and Bridges. Sub-Contractor. The individual or organization with whom a contractor has contracted to furnish or install all or a portion of the project. Submittals. Items required by the construction documents or contract to be submitted by the contractor or sub-contractor. These include but are not limited to CFS component design drawings. Truss Design Drawing. Written, graphic and pictorial depiction of an individual truss. Truss Designer. Person responsible for preparation of the truss design drawings. Truss Design Engineer. Person who is licensed to practice engineering as defined by the legal requirements of the jurisdiction in which the building is to be constructed and who supervises the preparation of the truss design drawings. Truss Member. A chord member or web member of a truss. Truss Placement Diagram. Illustration identifying the assumed location of each truss. Truss Submittal Package. Package consisting of each individual truss design drawing, and, as applicable, the truss placement diagram, the cover/truss index sheet, permanent individual truss member restraint/bracing details designed in accordance with generally accepted engineering practice, applicable permanent individual truss member restraint/bracing details, and any other structural details germane to the trusses. A3 Referenced Documents The following documents or portions thereof are referenced within this Code of Standard Practice and shall be considered part of the requirements of this document. 1. AIA 201, General Conditions of the Contract for Construction (1997), American Institute of

13 Code of Standard Practice for Cold-Formed Steel Structural Framing Architects, Washington, DC. 2. AISI S200-07, North American Standard for Cold-Formed Steel Framing General Provisions, American Iron and Steel Institute, Washington, DC. 3. AISI S201-07, North American Standard for Cold-Formed Steel Framing Product Data, American Iron and Steel Institute, Washington, DC. 4. AISI S with S2-08, North American Standard for Cold-Formed Steel Framing Truss Design, 2007 Edition with Supplement 2, American Iron and Steel Institute, Washington, DC. 5. ASTM A780-01, Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings, ASTM International, West Conshohocken, PA. 6. ASTM A1003/A1003M-05, Standard Specification for Sheet Steel, Carbon, Metallic and Non- Metallic Coated for Cold-Formed Framing Members, ASTM International, West Conshohocken, PA. 7. ASTM C645-06, Standard Specification for Nonstructural Steel Framing Members, ASTM International, West Conshohocken, PA. 8. ASTM C754-04, Standard Specification for Installation of Steel Framing Members to Receive Screw- Attached Gypsum Panel Products, ASTM International, West Conshohocken, PA. 9. ASTM C955-06, Standard Specification for Load-Bearing (Transverse and Axial) Steel Studs, Runners (Tracks), and Bracing or Bridging for Screw Application of Gypsum Panel Products and Metal Plaster Bases, ASTM International, West Conshohocken, PA. 10. SSMA, Product Technical Information, 2001 Edition, Steel Stud Manufacturers Association, Chicago, IL. A4 Responsibility for Design Prior to this Code of Standard Practice, design responsibilities for component assemblies were defined in several overlapping industry documents, which included the AISI S214, the North American Standard for Cold-Formed Steel Framing Truss Design, LGSEA Council Technical Note 551f on Specifying Trusses, and STCA Standard Practices and Recommended Guidelines on Responsibilities for Construction Using Cold- Formed Steel Trusses and Components. Where the AISI S214, the North American Standard for Cold-Formed Steel Framing Truss Design is referenced by the applicable building code, those responsibilities would be legally binding unless modified. However, design responsibilities for other types of CFS structural framing were only partially defined in several CASE documents, which included the National Practice Guidelines for Structural Engineer of Record and National Practice Guidelines for Specialty Structural Engineers. A key point of this Code of Standard Practice and the documents used in its development is that although design may be delegated, the building designer is responsible for the overall stability and integrity of the structure when completed.

14 6 AISI S A4.1 The building designer is responsible for the overall design of the building as required by the applicable building code. The building designer or the owner shall have a right to solicit designs, plans, specifications and data for the CFS structural framing or CFS component assemblies from the CFS component manufacturer, installer or specialty designer, but the responsibility for specifying the requirements of the design, including the applicable building codes and standards, remain with the building designer. A4.2 If the construction documents or contract specify CFS component assemblies, the construction documents or contract shall define the responsibility for design of the CFS component assemblies. If the construction documents or contract require that the CFS component manufacturer, installer or specialty designer be responsible for the design of CFS structural framing or component assemblies, the construction documents or contract shall state clearly and precisely the exact requirements, including all applicable building codes and design criteria. The building designer assumes the responsibility for specifying the appropriate design criteria and shall confirm that the specialty designer's work conforms to the intent of the construction documents. The building designer shall be responsible for reviewing submittal documents prepared by others, including phased and deferred submittal items, for compatibility with the design of the building. This review shall, at minimum, address the forces and reactions as identified by the specialty designer that are transmitted to those elements of the structure that are not designed by the specialty designer as well as coordinate the various structural-related submittals with each other to ensure compatibility with the main building structure. For lateral force-resisting systems, the design responsibilities of the building designer include but are not limited to design of roof/floor diaphragms, lateral load transferring elements (sometimes referred to as shear walls or shear transfer bracing), main lateral force-resisting elements and foundations, as well as compliance of the overall structure with applicable building codes. When the design of lateral load transferring elements is to be performed by a specialty designer or CFS component designer, the building designer must specify the following: (1) Magnitude of lateral load to be transferred; (2) Load path (i.e., where loads originate and where they are to be transferred); (3) Bearing material and conditions; and (4) Any special requirements for the design of the transferring elements. The building designer must also provide for the following in the design and detailing of the building: (1) Horizontal, vertical or other deflection requirements due to vertical or lateral loads, or both; and (2) Support and anchorage accommodating horizontal and vertical reactions due to lateral loads. A4.3 If the owner chooses not to hire a registered design professional, the owner is responsible for the suitability, adequacy and legality of all aspects of design in the plans and specifications. In this case, the owner is responsible for the review and approval of submittals. A4.4 The contractor or sub-contractor shall not be required to provide professional services which constitute the practice of architecture or engineering unless such services are specifically required by the construction documents or contract for a portion of the work or unless the contractor or sub-contractor needs to provide such services in order to carry out the contractor s or sub-contractor s responsibilities for construction means, methods, techniques, sequences and procedures. The provisions of Section A4.4 were based on AIA 201 Section ; however, references to the contractor were expanded to include both the contractor and sub-contractor.

15 Code of Standard Practice for Cold-Formed Steel Structural Framing B. CLASSIFICATION OF MATERIALS B1 Definition of Cold-Formed Steel Structural Framing CFS structural framing shall consist of the elements of the structural frame that are shown in the construction documents, essential to support the design loads and described as: CFS structural members. CFS component assemblies. Bracing and blocking necessary for the CFS structural framing or to provide stability for CFS structural members. Connection methods, hardware (fasteners, connectors, and post-installed anchors) and processes necessary for the installation of CFS structural framing. Lateral force-resisting system. Welding materials and processes related to the fabrication or installation of CFS structural framing. The items listed in Section B1 are normally fabricated or installed by the CFS component manufacturer or installer, and thereby define the scope of this Code of Standard Practice. B2 Other Items CFS structural framing shall not include other items that are not generally described in Section B1, even where such items are shown in the structural plans or are attached to the CFS structural framing unless specifically identified by item in the contract or construction documents, or both. Other items include but are not limited to: Awnings. Blocking for other attachments, such as door, window, cabinet, handrail, plumbing, awnings, storefront, glazing and other systems. Building cleaning equipment and equipment anchor support. Cables for permanent bracing or suspension systems. CFS concrete form decking. CFS floor decking. CFS non-structural framing. CFS roof decking. CFS wall sheathing, except as part of a lateral force-resisting system. Chimney support framing. Concrete slab edge forms. Drywall and plaster trims and accessories. Eave struts deployed as a component of a metal building system. Edge angles, plates, embeds and structural steel supports necessary for the support of suspended CFS framing. Embedded anchors. Expansion and control joints. Fastening systems for ceiling, wall, floor and roof sheathing materials. Fire, smoke and draft stopping. Flagpole support framing. Girts deployed as a component of a metal building system. Handrails and handrail support members. Insulation products.

16 8 AISI S Interior drywall (non-structural) framing. Mechanical equipment support framing. Metal building systems. Metal panels deployed as a component of a metal building system. Miscellaneous metal. Opening framing, if made from other than standard CFS structural shapes. Open-web steel joists. Plaster lathing, except where included with a prefabricated structural assembly. Purlins deployed as a component of a metal building system. Sheathing, unless part of a prefabricated structural assembly. Stairs, stair landings and stair railings. Stair component support framing. Structural steel framing. Structural steel lintels, if job-site installed. Structural steel plate. Support framing for cables. Support framing for sign structures. Suspended ceiling systems, proprietary or pre-engineered. Window washing supports. The items listed in Section B2 are normally not fabricated or installed by the CFS component manufacturer or installer. When such items are contracted to be provided by the CFS component manufacturer or installer, coordination will normally be required between the CFS component manufacturer or installer and other material suppliers and trades.

17 Code of Standard Practice for Cold-Formed Steel Structural Framing C. CONSTRUCTION DOCUMENTS Construction documents vary greatly in complexity. Nonetheless, the CFS component manufacturer and installer must be able to rely upon the accuracy and completeness of the construction documents. This allows the CFS component manufacturer and installer to provide the owner with bids that are adequate and complete. One of the contractor s responsibilities is to ensure proper communication of all facts throughout the construction phases of the project between all parties involved. The construction documents (i.e., architectural plans, structural plans, specifications and structural notes) are the primary method of communication. It is the building designer s responsibility to properly define the scope of work. When the contractor releases plans or specifications for construction, the CFS component manufacturer and installer rely on the fact that these are the owner s requirements for his project. Critical requirements that are necessary to protect the owner s interests, which affect the integrity of the structure or that are necessary for the CFS component manufacturer or installer to proceed with their work must be included in the construction documents. In some cases, however, the owner can benefit when reasonable latitude is allowed in the construction documents or contract for alternatives that can reduce cost without compromising quality. C1 Responsibilities C1.1 The owner or contractor shall furnish to the CFS component manufacturer and installer a set of construction documents of current issue including addenda showing the type of support supplied, method of attachment, correct dimensions, and required minimum or maximum sizes and spacings. C1.2 If construction documents are not available, the building designer shall provide complete information as specified in Section A4.2. C1.3 The construction documents or contract may require the CFS component manufacturer or installer to submit a complete design for approval or review prior to the commencement of construction. In the process of this submittal, the CFS component manufacturer or installer shall bring to the attention of the building designer any discrepancy within the construction documents. The building designer must present clear instructions to the CFS component manufacturer or installer on how to resolve each discrepancy. Changes resulting from such discrepancies shall be handled in accordance with Sections H5 through H9. C1.4 Architectural plans shall be legible, shall indicate the design intent of CFS structural framing, and shall include at a minimum the location of CFS structural framing, constraints on member size (e.g., web depth), wall and other assembly types, non-standard spacing and location requirements. C1.5 Structural plans shall show the structural member locations, sizes, reinforcing and connections in sufficient scale and detail to enable the construction of the building in a reasonable sequence by a competent contractor experienced in the techniques of construction for the specified materials. Structural plans may refer to architectural plans for dimensions, where appropriate. Elevations, sections and details should be of appropriate scale, number and extent to portray clearly the relationship of members to each other and their interconnection(s). Care should be taken to determine that details noted typical are applicable to the project or condition being portrayed.

18 10 AISI S C2 Limit of Responsibility The construction documents are assumed to be correct in all details, and the CFS component manufacturer s and installer s responsibility is limited to furnishing products in accordance with these documents and this Code of Standard Practice. Any change to these construction documents must be authorized in writing by the building designer. It should not be the responsibility of the CFS component manufacturer or the installer to compare the construction documents (i.e., architectural plans, structural plans, specifications and structural notes) against each other in order to verify consistency. This is typically the responsibility of the building designer. C3 Jurisdiction The construction documents shall specify the required building codes and authorities having jurisdiction. C4 Discrepancies or Omissions When a discrepancy or omission is discovered in the construction documents in the course of work by the contractor, CFS component manufacturer, installer or any other parties involved with the construction, the entity finding the discrepancy or omission shall promptly notify the contractor so that the discrepancy or omission can be resolved by the building designer. Such resolutions shall be timely so as not to affect the work of the CFS component manufacturer or installer. Changes resulting from such discrepancies or omissions shall be handled in accordance with Sections H5 through H9 as appropriate. While it is the responsibility of the CFS component manufacturer or installer to report any discrepancies or omissions that are discovered in the construction documents, it is not the responsibility of the CFS component manufacturer or installer to discover discrepancies or omissions, including those that are associated with the coordination of the various disciplines. The quality of the construction documents is the responsibility of the entities that produce those documents. C5 Revisions Revisions to the construction documents shall be made either by issuing new construction documents, by reissuing the existing construction documents, or by the RFI process. In all cases, revisions, including revisions that are communicated through responses to RFIs (see Section H5) or the review process (see Section D3), shall be clearly and individually indicated on such documents. If new construction documents are issued due to revisions, the parties issuing the new construction documents shall submit them to the contractor for distribution. The construction documents shall be dated and identified by revision number. Revised construction documents shall be identified by the same number throughout the duration of the project, regardless of the revision. See also Sections H5 through H9 as appropriate. Revisions to the construction documents can be made by issuing sketches and supplemental information separate from the construction documents. These sketches and supplemental information become amendments to the construction documents and are considered new construction documents. All sketches and supplemental information must be uniquely identified with a number and date as the latest instructions until such time as they may be superseded by new information. When revisions are made by revising and reissuing the existing construction documents, a unique revision number and date must be added to those documents to identify that information as the latest instructions until such time as they may be superseded by new information. The same unique drawing number must identify each drawing throughout the duration of the project so that revisions can be properly tracked, thus avoiding confusion

19 Code of Standard Practice for Cold-Formed Steel Structural Framing and miscommunication among the various entities involved in the project. When revisions are communicated through the annotation of submittals, such changes must be confirmed in writing by one of the aforementioned methods. This written confirmation is imperative to maintain control of the cost and schedule of a project and to avoid potential errors in fabrication and installation.

20 12 AISI S D. INSTALLATION DRAWINGS D1 Owner Responsibility D1.1 When the project is released for construction, the owner or contractor shall provide complete construction documents and relevant information (including addenda and other related drawings such as window shop drawings and architectural metal panel drawings) in a timely manner for the installation of CFS structural framing and, if required, for the preparation of CFS component design drawings and installation drawings. A scope of work for items required, having been agreed upon at the time of the contract, shall also be incorporated with these documents. This scope shall include and indicate all items that are to be fabricated and installed. D1.2 If the owner or contractor requests that submittals be prepared before the timely submittal of any other required documents, such as window shop drawings or architectural metal panel drawings, any changes required due to the differences between these drawings and the assumptions made in preparation of the submittals must be the responsibility of the building designer. Delays in obtaining such required information can extend the schedule agreed to at time of contract. D2 Component Manufacturer and Installer Responsibility D2.1 The CFS component manufacturer or installer shall submit submittals including provisions per Chapter I, when required by and per the construction documents or contract, on a schedule formulated and agreed to at time of contract. The CFS component manufacturer or installer should be permitted to use the services of a specialty designer or independent detailer to produce shop drawings or installation drawings and to perform other support services. When the CFS component manufacturer or installer provides a schedule for submittals, it must be recognized that this schedule may be affected by revisions, response time to RFI(s), and resolution of discrepancies or omissions. D2.2 Requests for supplemental structural support elements, such as miscellaneous structural steel or embedded items not specified in the construction documents or contract, shall be submitted by the CFS component manufacturer or installer and handled in accordance with Sections H5 through H9. Delays in obtaining confirmation of such requests can extend the schedule agreed to at time of contract. D3 Review Process Upon receipt of shop drawings from different trades, the owner or contractor must review each submittal, as well as forward it as appropriate to the building designer for review in order to assure continuity and completeness. The different trade submittals must be reviewed to ensure conformity and identify conflicts or gray areas not covered by any trade but necessary to integrate the different trades. D3.1 The owner or contractor shall forward the submittals to the building designer for review. The building designer shall return the submittals indicating one of the following: reviewed (no exception taken), reviewed as noted (re-submittal not required), revise and resubmit, or rejected.

21 Code of Standard Practice for Cold-Formed Steel Structural Framing D3.2 The owner or contractor shall return to the CFS component manufacturer or installer one set of the submittals indicating one of the following: approved (no exception taken), approved as noted (re-submittal not required), revise and resubmit, or rejected. D3.3 If modifications are required, the CFS component manufacturer or installer and specialty designer, if retained by the CFS component manufacturer or installer, shall have at least fourteen (14) calendar days for incorporating the required changes. D3.4 If modifications with the re-submittal are required, the submittals shall be resubmitted to the contractor for construction for review and approval in accordance with Sections D3.1 and D3.2 after all required modifications and corrections have been executed. If such modifications involve a single item or minor changes, only those items need to be revised and resubmitted. These revisions may be appended to the original submittals. For example, if one CFS component design drawing among several designs is incorrect, that design should be revised and resubmitted. However, if the design criteria have been revised, all the CFS component design drawings based on that criteria must be revised and resubmitted. Revisions to the CFS component design drawings can be made by issuing sketches and supplemental information separately from the CFS component design drawings. D3.5 Should modifications be required which were not part of the agreed to scope of work, the CFS component manufacturer or installer shall submit in writing an appropriate modification to the contract price for this modification (including but not limited to engineering, material, labor, overhead and profit) for approval by the owner or contractor. D3.6 The CFS component manufacturer or installer shall not proceed with any portion of work until all modifications and extra charges for that portion of work are resolved. The intent of this section is to protect all parties from potential risks and costs associated with proceeding prior to the resolution of issues. D3.7 It is the responsibility of the owner or the contractor to ensure that the above submittal process is coordinated with the project schedule. D4 General Responsibility D4.1 The owner or owner's representative for construction is responsible for approval of the submittals prepared by the CFS component manufacturer or installer that have been reviewed by the building designer. This approval and review indicate that the CFS component manufacturer or installer has correctly interpreted the construction drawings and contract requirements and is released to start fabrication and installation. D4.2 Approval by the owner or contractor and review by the building designer of submittals does not relieve the CFS component manufacturer or installer of the responsibility for compliance with the project plans and specifications, accuracy of quantities and dimensions on submittals, the general fit-up of parts to be assembled in the field, or for providing acceptable workmanship. When the CFS component manufacturer or installer intends to make a submission of an alternate to what is shown in the contract documents, the CFS component manufacturer or installer must notify the owner, contractor, or the building designer in advance. This will allow the parties involved to schedule the review of the alternate for impact on cost, schedule and benefits. This evaluation may result in the rejection of the alternate. However, if alternate submittals are reviewed and approved, this constitutes acceptance by the owner, contractor, or building designer of materials, criteria or designs that may differ from those required by the contract documents.

22 14 AISI S E. MATERIALS E1 Structural Members E1.1 Steel of a higher-than-specified grade, base steel thickness, or coating may be substituted for the grade, base steel thickness, or coating as specified, unless specifically prohibited in the construction documents or contract. E1.2 Changes in size or shape of structural members shall require the consent of the building designer. E1.3 Structural members shall comply with the manufacturing tolerances listed in ASTM C955. E1.4 CFS component assemblies shall have structural members that are cut and assembled in accordance with the tolerances prescribed in the AISI S200. Trusses shall have structural members that are cut and assembled in accordance with the additional requirements of the AISI S214. E2 Fasteners and Connection Hardware E2.1 Use of a larger-than-specified fastener shall be permitted, provided that the minimum spacing and edge distance requirements of the larger fastener are met and the strength requirements of the specified fastener are met. E2.2 Connection hardware (i.e., connectors and post-installed anchors) shall be as specified in the approved design, except for substitutions accepted by the building designer. E3 Preparation of Material E3.1 Proper methods of cutting in accordance with AISI S200 are to be selected by the installer, unless otherwise specified in the construction documents or contract. E3.2 In the manufacture of structural members and connection hardware, mechanical braking, bending or forming is permitted. E4 Member Identification Structural members shall be identified in accordance with the product identification requirements for framing members defined in AISI S200. E5 Special Marking CFS component assemblies shall be marked, as necessary, to document such items as proper orientation, special bearing conditions and permanent bracing requirements. Alternatively, it shall be acceptable for the specialty designer to provide this information to the installer by means of indications on the CFS component placement diagrams. E6 Camber CFS component assemblies will only be provided with camber if specified by the building designer.

23 Code of Standard Practice for Cold-Formed Steel Structural Framing F. INSTALLATION F1 Scope Items of CFS to be installed shall be enumerated in the contract. F2 Site Conditions This section is deemed important for the safety and efficiency of the installer and the installer s crew, as well as for the protection of the people, property, etc., which may be present at the site at the time of installation. F2.1 The installer shall be permitted to use the most efficient and economical method and sequence of installation or assembly available consistent with the construction documents. When the owner or contractor contracts separately with a CFS component manufacturer and installer, the owner or contractor is responsible for coordinating work between these two parties. F2.2 The installer shall examine areas and conditions under which framing materials are to be installed. Work shall not proceed until unsatisfactory conditions have been corrected by those responsible. F2.3 The contractor shall provide and maintain adequate access necessary for equipment and framing materials to be installed. The contractor shall provide the installer level, convenient, and adequate space to safely use the necessary equipment and install the framing materials. F2.4 The contractor shall coordinate installation drawings, resolution of dimensional problems, compatibility of various trades and installation. F3 Delivery, Handling and Storage of Materials F3.1 It is the receiving entity s responsibility to verify that framing materials arrive in good condition. If framing materials arrive at a destination in a damaged condition, the receiving entity shall promptly notify the material supplier or CFS component manufacturer prior to unloading the framing material, or promptly upon discovery and prior to installation. F3.2 It is the contractor s or the installer s responsibility to verify the framing material is not damaged and meets the project specifications or approved submittals before installation. The material supplier or CFS component manufacturer shall be responsible solely for the replacement of damaged material or material that does not meet the project specifications or approved submittals or both. If the contractor or the installer installs damaged material, then that party assumes the cost of repairing or installing new materials. At no time will the consequential costs to be assumed by the material supplier or CFS component manufacturer exceed the selling price of the particular material in question. F3.3 Damage caused by improper storage or handling of framing materials on the job site is not the responsibility of the material supplier or CFS component manufacturer. F3.4 Proper storage of framing materials on the job site is the responsibility of the receiving entity, and requires that framing materials not be in direct contact with the ground and be protected from the elements. Adequate drainage and ventilation shall be provided to minimize the formation of wet storage stain or white rust. F3.5 Proper handling of framing materials on the job site is the responsibility of the contractor and installer, and requires that care be exercised to not cause significant damage to the metallic coating. Bare steel exposed at minor scuffs and scratches is generally protected by